Furnace-door and operating means therefor.



A. E, VEZ|NA. FuNNAcE 000A AND OPERATING MEANS TNENEFON. APPLICATIONFILED PK.14| 913- RENEWED MAY 15,1916- 1,209,082. PatentedI)ec.19,1916.l

lllllll illit.

SWW/nto@ wwf/neg ws co.. Momummwnmumw. v c

FURNAoE-Doon AND OPERATING MEANS THEREEOR.

Specification of Letters Patent.

ratenteanee. 19, 1916.

Application led April 14, 1913, Serial No. 761,011. Renewed May 15,1916. Serial No. 97,731.

To all whom t may concern Be it known that I, ANTOINE EMILE VEZINA, asubject of the King of` Great Britain, and a resident of' the city ofMontreal, in the Province of Quebec, in the Dominion of Canada, haveinvented certain new and useful Improvements in Furnace- Doors andOperating Means Therefor; andv The objects of the invention are todevise a door that will relieve the attendant from much of the dangerand trouble incident toy the care of a furnace, tominimize the length ofthe period that the furnace doorV is open during the time of firing up,to facilitate the operation of sliding doors and generally to providea'V simple, cheap and durable construction for the aforesaid purpose.

In the drawings, Figure 1 is a front view of the furnace doors andoperating mechanism showing one set of slats partly broken away. Fig. 2is a plan view from the top. Fig. 3 is an end view of the door, castingand 'mechanism showing parts of the device in vertical section.

Like numerals of reference indicate corresponding parts in each figure.

Referring to the drawings, 1 are horizontal plates mounted on thewinding posts 2 adjacent toeach end thereof and having the arc-shapedslots 3 made in the corners thereof and forming, with said post, reelshaving four flat sides 4L. 5 is a casting having the central ovalopening 6 therethrough, the anges 7 and 8 extending outwardly therefromforming bearings for the winding posts 2 and the lugs 9 from the rearside. 10 are slats having the outwardly extending flanges 11 at the topand bottom thereof forming hinge members. 12 are rods forming the pinmembers of the hinges and joining said plates together in two Vsets fordouble doors to close said opening 6. The

outer end slats are hinged to the said winding posts and the plates 1engage the slats so that said slats roll around said reels and formrolling and sliding doors.

13 are guides extending across the upper and lower ends of the slats 10and guiding said slats over the opening 6.

14 are guards extending in-curves forwardly at each end of-the casting 5adjacent to the upper plates 1.

' l5 are hearings secured to the head wall of the furnace below thecasting 5 or forming part therewith.

16 is a horizontal crank shaft journaled in the bearings 15.

1.7 is a crank lever mounted on the crank shaft 16 intermediate of thelength thereof.

18 is a pedal arm mounted in the bearing 19 supported on the fioor ofthe furnace room. Y

20 is a pedal at the upper end of the pedal arm.

21 is a connecting rod joining the crank lever 17 to the pedal arm 18intermediate of the length of the latter.

22 is a spiral spring encircling the shaft 1G, one end being attached tothe bearing 15 and the other end to the shaft and winding up tightly on.said shaft on' the' operation of the pedal 20, thus insuring the reversedirection of rotation of said shaft o the release of said pedal.

23 are bevel gears mounted at the lower end of the winding post 2.

2J( .are segmental bevel gears mounted at the ends of the shaft 16 andcoacting with the bevel gears23 on the rotation of the shaft 16.

1t will be seen that the operation of this invention is very simpleindeed, as the double door is kept normally closed and in this posit-ionthe spring 22 is only slightly in tension, so there is a minimumcontinuous strain onV the said spring.

In order to open the doors to fire up the attendant presses his foot onthe pedal, which rotates the crank shaft and as the segmental gearscoact with the other gears, the reels or winding posts will be rapidlyrotated, thus drawing the sets of slats apart and winding each set on areel. The moment the pressure on the pedal is released the spring 22reverses the direction of rotation of the shaft 16, which reverses thedirection of rotation of said winding posts and unreels the slats, whichare guided over the fire box door opening` by the guides 13, until theymeet in the center.

Vhat I claim is l. In furnace doors and operating means therefor, aframe secured to the head of the furnace having Abearings projecting"outwardly therefrom at each corner thereof, posts journaled in saidbearings, plates mounted on said posts adjacent to saidbearings, slatdoors winding on said plates, gears mounted on the lower ends of saidposts, a spring held horizontal shaft journaled in suitable bearingssupported at the lower end of said frame, a crank mounted on saidhorizontal shaft, a pedal, a connecting rod from said pedal to saidcrank, and segmental gears mounted on said horizontal shaft and coactingwith said gears.

2. A furnace door and operating means therefor, comprising, a framehaving outstanding lugs at the upper and lower corners forming postbearings and downwardly extending lugs at the lower end forming shaftbearings, posts journaled in said post bearings, a shaft journaled insaid shaft bearings, ai spiral spring encircling said shaft and attachedthereto and to a lug, 'a crank xedly mounted on said shaft, a pedalsuitably connected with said crank,

l a pair of bevel gears, one mounted on each post at the lower end,coacting gears mounted on said shaft, and a plurality of slats hingedtogether in two sections respectively and adapted to be wound around theposts on the pressure of said pedal.

3. A furnace door and operating means therefor', comprising, arectangular frame having lugs extending inwardly therefrom, lugsextending outwardly therefrom at the upper and lower corners formingshaft bearings, brackets depending from the lower corners forming shaftbearings and gear frames, and curved guides extending laterally andforwardly from the top of the sides, posts journaled in said postbearings, a shaft j ournaled in said shaft bearings and spring held inits normal position, gears mounted at the lower end of said posts,coacting gears mounted on said shaft, a pedal operatively connected withsaid shaft, and slats vertically arranged and hinged together in twosections respectively.

4. A furnace door and operating means therefor, comprising a pluralityof slats `each having outwardly extending flanges at the top and bottomthereof, rods pivotally secured in said flanges adjacent to the endsthereof and joining said slats together in two sections and formingdouble doors, a frame having guides for sliding said slats and bearingsat the ends, winding posts journaled in said bearings, plates mountedtoward the upper and lower ends of said posts and having their cornersslotted to receive said rods, and means for operating said posts.

Signed at the city of Montreal, Province of Quebec, Canada, this 27thday of February, 1913.

ANTOINE EMILE VEZINA.

Witnesses:

R. A.l SHEE, M. PATENAUDE.

Gopies of this patent may be obtained for live cents each, byaddressngthe Commissioner of Patents,

' Washington, D. C.

